Harbor Freight has a special sale - mechanic's stethoscope for $3, Centech OBD II Scanner for $40, etc. These tools can help you in diagnostics. I don't know this model of Scanner so check before you buy. Buy only tools that you need, not because they are cheap and always check build quality. If you want better tools, go to Sears, Grainger, etc. And please, I don't work nor have any relationship with HF.
http://www.harborfreight.com/retail-fly ... ource=1006
